chemistry of life

Question 1

matter

Answer 1

what takes up space and has mass

Question 2

element

Answer 2

smallest possible thing

cannot be broken down by a chemical reaction

Question 3

what do compounds consist of

Answer 3

2 or more elements in a fixed ratio

Question 4

who was the period table developed by

Answer 4

dimitri mendelevev

Question 5

how many elements were there originatly in the periodic table

Answer 5

56

Question 6

what are collums called

Answer 6

groups

Question 7

how many % of elements are essential

Answer 7

20%

Question 8

essential elements

Answer 8

C,H,O,N

Question 9

what are atoms composed of

Answer 9

subatomic particles

Question 10

neutrons

Answer 10

in nucleus
no charge
has weight

Question 11

protons

Answer 11

in nucleus

+ charge

Question 12

electrons

Answer 12

are in electrical charge
- charge
radiates around nucleus

Question 13

atomic #

Answer 13

element identidy

Question 14

isotopes

Answer 14

elements have same protons but diff nutrons

Question 15

ionic bonding

Answer 15

when you transfer electrons

Question 16

gaining electrons

Answer 16

• charge

Question 17

loosing electrons

Answer 17

+charge

Question 18

metals

Answer 18

group 1 and 2
usually bond
are givers

Question 19

non metals

Answer 19

share electrons

Question 20

double bond

Answer 20

when elements share more then one electrons

Question 21

covelant bond

Answer 21

sharing a pair of valence electrons by 2 atoms

can form between atoms of same and diff element

Question 22

2 types of valence electrons

Answer 22

polar and non polar

Question 23

polar covalent bond

Answer 23

non equal

one atom will be pulling more and one will be pulling less

Question 24

ex of a polar covalent bond

Answer 24

water

Question 25

non polar covalent bond

Answer 25

equally electronegative

sharing electrons equally

Question 26

componds

Answer 26

combination of 2 or more elements

Question 27

ionic bonding

Answer 27

complete transfer of electrons

Question 28

hydrogen bonds

Answer 28

hydrogen atoms is covalently bonding to one electronagative atom

Question 29

are hydrogen bonds strong or weak

Answer 29

weak

Question 30

electronegativity

Answer 30

an atoms attraction for the electrons in a covalent bond

Question 31

why in a molecule will functions be based on shape

Answer 31

bc it has a shape

Question 32

chemical reactions

Answer 32

the making and breaking of chemical bonds

Question 33

reactants

Answer 33

what you put in a chemical reaction

Question 34

products

Answer 34

what comes out

Question 35

halogen

Answer 35

salt

Question 36

mettaloids

Answer 36

have multiple charges

have properties of both metals and non metals

Question 37

isotopes

Answer 37

same elements but diff mass

Question 38

noble gases

Answer 38

have similar properties

Question 39

van der wall atractions

Answer 39

when 2 molecules that both have unstable elements get together and are attracted to each other